/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package com.cqcomponents.tags;

import java.io.IOException;

import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.PageContext;
import javax.servlet.jsp.tagext.SimpleTagSupport;

import org.apache.sling.api.SlingHttpServletRequest;
import org.apache.sling.api.resource.Resource;
import org.apache.sling.api.resource.ResourceResolver;
import org.apache.sling.api.scripting.SlingBindings;
import org.apache.sling.api.scripting.SlingScriptHelper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.cqcomponents.api.components.IComponentManager;

public abstract class AbstractComponentTag extends SimpleTagSupport {

	protected Logger logger = LoggerFactory.getLogger(this.getClass());
	protected IComponentManager componentManager;

	protected void println(String message) throws IOException {
		this.getOut().println(message);
	}

	private final JspWriter getOut() {
		return getPageContext().getOut();
	}

	protected final Resource getResource() {
		return getSlingHttpServletRequest().getResource();
	}

	protected final String getResourcePath() {
		return getResource().getPath();
	}

	protected final PageContext getPageContext() {
		return (PageContext) this.getJspContext();
	}

	protected final SlingHttpServletRequest getSlingHttpServletRequest() {
		return (SlingHttpServletRequest) getPageContext().getRequest();
	}

	protected final ResourceResolver getResourceResolver() {
		return this.getSlingHttpServletRequest().getResourceResolver();
	}

	protected IComponentManager getComponentManager() {
		if (componentManager == null) {
			SlingBindings bindings = (SlingBindings) getSlingHttpServletRequest()
					.getAttribute(SlingBindings.class.getName());
			SlingScriptHelper scriptHelper = bindings.getSling();
			componentManager = scriptHelper.getService(IComponentManager.class);
		}
		return componentManager;
	}
}